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All Journal MACHINERY: Jurnal Teknologi Terapan Aptekmas : Jurnal Pengabdian Kepada Masyarakat
Irawan Malik
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APLIKASI MATLAB DALAM MENGUKUR KEBULATAN HASIL INDENTASI UJI KEKERASAN BAGI KARYAWAN PT. SRI TERANG LINGGA PALEMBANG Irawan Malik; Moch Yunus; Soegeng Witjahjo; Romli Romli
Aptekmas Jurnal Pengabdian pada Masyarakat Vol 2 No 1 (2019): APTEKMAS Volume 2 Nomor 1 2019
Publisher : Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (211.918 KB) | DOI: 10.36257/apts.v2i1.1299

Abstract

Provision of spare parts for production equipment needs to be prepared with specifications, number of needs and correct time of availability, and especially for critical machining components that require correct and appropriate tactics so as not to disrupt its continuity of production. However, it is not a secret for a production department to make replacement parts that have the same mechanical properties through hardness testing of components that have failed. Through a computer program with an algorithm that is able to read a photo as a result of an indentation emphasis on hardness test, it can be known quickly a roundness diameter and calculate its hardness value which will be converted into one of the mechanical properties of a material so that a profile projector is not needed. Core of this implementation of our community service program is through an assignment scheme for employees of PT. Sri Trang Lingga Palembang, located on road TPA 2, RT. 26, RW. 29, Keramasan Subdistrict, Kertapati, Palembang City, South Sumatra, postal code 30149 is how to provide theoretical and experimental knowledge of the implementation of hardness tests on metal materials by emphasizing use of computer algorithms in reading photos of indentation hardness test results as an alternative to replacement use profile projector tool that is usually used for students of D-IV Mechanical Engineering Production and Maintenance (TMPP) Department of Mechanical Engineering Sriwijaya State Polytechnic to determine size of the indentation diameter emphasis from Brinnel hardness test.
PENGENALAN PENGGUNAAN SIMULASI PENGECORAN BAGI USAHA COR LOGAM DI PALEMBANG Irawan Malik; Moch. Yunus; Dwi Arnoldi; Yogi Eka Fernandes
Aptekmas Jurnal Pengabdian pada Masyarakat Vol 4 No 4 (2021): APTEKMAS Volume 4 Nomor 4 2021
Publisher : Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (414.09 KB) | DOI: 10.36257/apts.v4i4.3500

Abstract

Problems in metal casting include, among others, air cavity defects caused by use of pour plate and descending channel models which are directly used in sand molds; air or gas from sand mold or aluminum scrap liquid metal cannot escape through cavity between the sand grains during pouring process; river sand is in the form of crystalline sand grains which can affect fire resistance and low permeability in sand molds, consequently requiring large amounts of binder; and water content in river sand for making sand molds is less than 1.5% - 8% as a result, clay will experience a lack of binding power in the sand. Departing from the above problems, it is necessary to pay attention to design stages, especially in e field of casting product design, which currently uses a lot of software that can support businesses, such as Solidworks Computer Aided Design - Computer Aided Manufacturing software and casting simulation software such as Altair Inspire cast. Design of cast objects and simulation in preparation for making molds and core castings using Solidworks and Altair Inspire Cast software aims to obtain accuracy of the cast objects so that they do not require much finishing work and the simulation of casting process is expected to reduce casting failures as described. Essence of implementation of community service programs through (additional) assignment schemes for small industries Mandiri of metal cast in Palembang is how to provide theoretical knowledge of designing cast objects using CAD software and simulate the casting process which is usually used for students of study program D-IV in Mechanical Engineering of Production and Maintenance (TMPP) - State Polytechnic of Sriwijaya. to find out the best design model and casting process so as to minimize casting defects.
Wita, Wantri Kasma PENGARUH SUHU DAN KECEPATAN MOTOR MESIN PULTRUSION TERHADAP DIAMETER FILAMEN 3D PRINTING Kasma Wita, Wantri; Irawan Malik; Sairul Effendi
MACHINERY Jurnal Teknologi Terapan Vol. 5 No. 2 (2024): Machinery: Jurnal Teknologi Terapan
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.12736097

Abstract

3D printing technology enables the creation of 3D objects from 3D CAD designs using various types of thermoplastic materials, such as PLA, ABS, PET/-G, TPU, PP, and Nylon. Among these materials, PET stands out as an ideal choice for 3D printing applications due to its advantages, namely clarity and strength. The process of producing 3D objects involves the use of filaments that can be generated through either extrusion or pultrusion methods. While the pultrusion method with Arduino Uno control settings shows promise, further research is required to enhance the quality of the produced filaments. In this study, the filament production process involves process parameters, including temperatures of 140°C, 145°C, 150°C, and motor speeds of 75 rpm, 80 rpm, 85 rpm, and 90 rpm. Based on the research findings, the smallest filament diameter was observed at a temperature of 150°C and a motor speed of 90 rpm. Conversely, the largest filament diameter was found at a temperature of 140°C and a motor speed of 75 rpm with a nozzle diameter of 1.75 mm. The highest filament quality was achieved using a nozzle diameter of 1.6 mm, resulting in an average filament diameter of 1.75 mm. Through non-linear regression analysis, it can be concluded that each process parameter has a simultaneous impact on the filament diameter. The results of this study provide insights into optimizing process parameters in the pultrusion method to produce high-quality filaments in 3D printing technology.
Unjuk Kerja Desain Prototype Penepat Las dan Bor Bermagnet Berdasarkan Analisis Ergonomi dengan Metode Quick Exposure Checklist Piyata Wira Yonatan Sitohang; Irawan Malik; Sairul Effendi
MACHINERY Jurnal Teknologi Terapan Vol. 5 No. 2 (2024): Machinery: Jurnal Teknologi Terapan
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.12738743

Abstract

This study aims to develop a prototype design for an ergonomic welding and drilling clamping tool and evaluate its performance by analyzing relevant ergonomic aspects using the Quick Exposure Checklist method. The data utilized encompasses primary data obtained through observations, literature reviews, questionnaires, and field studies. The findings of this research indicate that the resulting prototype design for the welding and drilling clamping tool exhibits a good level of ergonomics, with the ergonomic evaluation test results reaching 37%. This value is slightly below the recommended action limit of 40%, indicating that the tool meets the safe ergonomic criteria based on the Quick Exposure Checklist method.
Wulandari, Sri OPTIMALISASI DESAIN GROOVE UNTUK MENINGKATKAN KINERJA BUSHING PADA RODA BOGIE BERBASIS SIMULASI CFD wulandari, Sri Wulandari; Fatahul Arifin; Irawan Malik
MACHINERY Jurnal Teknologi Terapan Vol. 5 No. 3 (2024): Machinery: Jurnal Teknologi Terapan
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.14242112

Abstract

Optimization is a process of maximizing an object to find the best results from a set of alternative solutions that exist, so as to increase its effectiveness, such as profits, minimize process time and so on. This thesis aims to conduct CFD (Computational Fluid Dynamics) simulation analysis on bushings with different grooves in an effort to improve lubrication efficiency. This research uses CFD (Computational Fluid Dynamics) simulation analysis on bushings with different grooves in an effort to improve lubrication efficiency. This research uses CFD (Computational Fluid Dynamics) simulation where a method is used to model, analyze, and related phenomena in the system using a numerical approach. The addition of grooves or grooves on the bushing surface can affect the flow of lubricant around it. Through CFD simulation, the author will compare the performance of various groove designs to identify models that provide better lubrication. The results of this research are expected to provide valuable insights in the development of more lubrication-efficient bushings.
Co-Authors Dwi Arnoldi Fatahul Arifin Kasma Wita, Wantri Moch. Yunus Mochammad Yunus, Mochammad Piyata Wira Yonatan Sitohang Romli Romli Sairul Effendi Soegeng Witjahjo Sri Wulandari Wulandari, Sri Wulandari Yogi Eka Fernandes